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https://www.readbyqxmd.com/read/29237324/systemic-lupus-erythematosus-arthropathy-the-sonographic-perspective
#1
A Di Matteo, R De Angelis, E Cipolletta, E Filippucci, W Grassi
Background Despite being promising, the use of ultrasound (US) in the assessment of musculoskeletal manifestations of systemic lupus erythematosus (SLE) is still limited. Literature on this topic is scarce and the spectrum and clinical relevance of US abnormalities has not yet been outlined. With this paper, we aim to explore the panel of joint and tendon US findings in a group of SLE patients. Methods Twenty-five consecutive SLE patients, with current or medical history of musculoskeletal symptoms, were studied...
January 1, 2017: Lupus
https://www.readbyqxmd.com/read/29230843/cardiac-function-in-pediatric-patients-with-congenital-adrenal-hyperplasia-due-to-21-hydroxylase-deficiency
#2
Christiaan F Mooij, Milanthy S Pourier, Gert Weijers, Chris L de Korte, Zina Fejzic, Hedi L Claahsen van der Grinten, Livia Kapusta
BACKGROUND: Hyperandrogenism and exogenous glucocorticoid excess may cause unfavorable changes in the cardiovascular risk profile of patients with congenital adrenal hyperplasia (CAH). OBJECTIVE: To evaluate the cardiac function in pediatric patients with CAH. PATIENTS AND METHODS: 27 pediatric patients with CAH, aged 8-16 years, were evaluated by physical examination, electrocardiogram (ECG), conventional echocardiography, tissue Doppler imaging and two-dimensional (2D) myocardial strain (rate) imaging...
December 11, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/29219274/bilateral-testicular-torsion-in-an-adolescent-a-case-with-challenging-diagnosis
#3
L Lorenzo, E Martínez-Cuenca, E Broseta
Bilateral testicular torsion is a very uncommon emergency, with a challenging differential diagnosis. We describe the case of a 15-year-old patient with a left testicular torsion of 48 hours of duration and a sudden onset of right scrotum pain during his stay at the emergency area. Bilateral testicular torsion was diagnosed after repeat physical examination and doppler ultrasound, which had been normal for right testis in a first evaluation. Surgical exploration was performed with orchiectomy in left testis and fixation in right testis...
December 11, 2017: International Braz J Urol: Official Journal of the Brazilian Society of Urology
https://www.readbyqxmd.com/read/29211720/blazar-spectral-variability-as-explained-by-a-twisted-inhomogeneous-jet
#4
C M Raiteri, M Villata, J A Acosta-Pulido, I Agudo, A A Arkharov, R Bachev, G V Baida, E Benítez, G A Borman, W Boschin, V Bozhilov, M S Butuzova, P Calcidese, M I Carnerero, D Carosati, C Casadio, N Castro-Segura, W-P Chen, G Damljanovic, F D'Ammando, A Di Paola, J Echevarría, N V Efimova, Sh A Ehgamberdiev, C Espinosa, A Fuentes, A Giunta, J L Gómez, T S Grishina, M A Gurwell, D Hiriart, H Jermak, B Jordan, S G Jorstad, M Joshi, E N Kopatskaya, K Kuratov, O M Kurtanidze, S O Kurtanidze, A Lähteenmäki, V M Larionov, E G Larionova, L V Larionova, C Lázaro, C S Lin, M P Malmrose, A P Marscher, K Matsumoto, B McBreen, R Michel, B Mihov, M Minev, D O Mirzaqulov, A A Mokrushina, S N Molina, J W Moody, D A Morozova, S V Nazarov, M G Nikolashvili, J M Ohlert, D N Okhmat, E Ovcharov, F Pinna, T A Polakis, C Protasio, T Pursimo, F J Redondo-Lorenzo, N Rizzi, G Rodriguez-Coira, K Sadakane, A C Sadun, M R Samal, S S Savchenko, E Semkov, B A Skiff, L Slavcheva-Mihova, P S Smith, I A Steele, A Strigachev, J Tammi, C Thum, M Tornikoski, Yu V Troitskaya, I S Troitsky, A A Vasilyev, O Vince
Blazars are active galactic nuclei, which are powerful sources of radiation whose central engine is located in the core of the host galaxy. Blazar emission is dominated by non-thermal radiation from a jet that moves relativistically towards us, and therefore undergoes Doppler beaming. This beaming causes flux enhancement and contraction of the variability timescales, so that most blazars appear as luminous sources characterized by noticeable and fast changes in brightness at all frequencies. The mechanism that produces this unpredictable variability is under debate, but proposed mechanisms include injection, acceleration and cooling of particles, with possible intervention of shock waves or turbulence...
December 4, 2017: Nature
https://www.readbyqxmd.com/read/29201481/cystic-lymphangioma-of-the-chest-wall-in-a-5-year-old-male-patient-a-rare-and-atypical-localization-a-case-report-and-comprehensive-review-of-the-literature
#5
Dimitrios Patoulias, Ioannis Patoulias, Christos Kaselas, Maria Kalogirou, Chatzopoulos Kyriakos, Farmakis Konstantinos, Thomas Feidantsis, Papacrivou Eleni
Lymphangioma is a benign congenital malformation. The extremely rare and atypical localization of a lymphangioma in the chest wall was the real motive for the present case study. A 5-year-old boy was admitted to the Emergency Department of the 1st Department of Pediatric Surgery, Aristotle University of Thessaloniki, due to the presence of a mildly painful swelling in the left lateral chest wall, which was first noticed three months ago, after a blunt injury during sport. Physical examination revealed the presence of a palpable, spherical, painful, nut-sized subcutaneous lesion in the left lateral chest wall, respectively, with the anterior axillary line, at the height of the 6th to 7th intercostal space...
2017: Case Reports in Pediatrics
https://www.readbyqxmd.com/read/29200974/stroke-volume-monitoring-novel-continuous-wave-doppler-parameters-algorithms-and-advanced-noninvasive-haemodynamic-concepts
#6
REVIEW
R A Phillips, B E Smith, V M Madigan
Purpose of Review: Adequate oxygen delivery is essential for life, with hypoxia resulting in dysfunction, and ultimately death, of the cells, organs and organism. Blood flow delivers the oxygen bound in the blood, while haemodynamics is the science of blood flow. Stroke volume (SV) is the fundamental unit of blood flow, and reflects the interdependent performance of the heart, the vessels and the autonomic nervous system. However, haemodynamic management remains generally poor and predominantly guided by simple blood pressure observations alone...
2017: Current Anesthesiology Reports
https://www.readbyqxmd.com/read/29198900/time-course-of-flow-mediated-dilation-and-vascular-endothelial-growth-factor-following-acute-stroke
#7
Sandra A Billinger, Jason-Flor V Sisante, Alicen A Whitaker, Michael G Abraham
OBJECTIVES: People after stroke demonstrate alterations in vascular endothelial function measured by flow-mediated dilation. Limited information is available in the literature on possible protective factors following stroke. The aims of the secondary analysis were (1) to characterize the time course of vascular endothelial function using flow-mediated dilation at 72 hours after stroke and 1 week later during inpatient stroke rehabilitation and (2) to determine whether flow-mediated dilation was related to vascular endothelial growth factor, brain-derived neurotrophic factor, or estimated prestroke peak oxygen uptake...
November 30, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/29190874/-subaortic-membrane-in-adults-a-brief-review-of-literature-apropos-of-one-case
#8
Katherine Ruiz, Jorge Curotto-Grasiosi, Rogelio A Machado, Adriana Angel, Diego Alasia, Bruno Peressotti
A 54-year-old man, ex smoker with high blood pressure and a history of possible Wolff-Parkinson-White syndrome was admitted for presenting an episode suggestive of acute coronary syndrome with immediate syncope and left bundle branch block, while performing physical activity. Angioplasty and a drug-eluting stent were performed in the left circumflex artery. Subsequently, Doppler echocardiography disclosed an image suggestive of a subaortic membrane. Given these findings, the patient underwent a 3D transesophageal echocardiogram and a magnetic resonance study, which confirmed the diagnosis of a subaortic membrane...
November 2017: Revista Médica del Instituto Mexicano del Seguro Social
https://www.readbyqxmd.com/read/29166102/testing-the-limits-of-the-maxwell-distribution-of-velocities-for-atoms-flying-nearly-parallel-to-the-walls-of-a-thin-cell
#9
Petko Todorov, Daniel Bloch
For a gas at thermal equilibrium, it is usually assumed that the velocity distribution follows an isotropic 3-dimensional Maxwell-Boltzmann (M-B) law. This assumption classically implies the assumption of a "cos θ" law for the flux of atoms leaving the surface. Actually, such a law has no grounds in surface physics, and experimental tests of this assumption have remained very few. In a variety of recently developed sub-Doppler laser spectroscopy techniques for gases one-dimensionally confined in a thin cell, the specific contribution of atoms moving nearly parallel to the boundary of the vapor container becomes essential...
November 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29158018/centile-curves-for-velocity-time-integral-times-heart-rate-as-a-function-of-ventricular-length-the%C3%A2-use-of-minute-distance-is-advantageous-to%C3%A2-enhance-clinical-reliability-in-children
#10
Anna Solinski, Elmar Klusmeier, Jan-Pit Horst, Hermann Körperich, Nikolaus A Haas, Deniz Kececioglu, Kai Thorsten Laser
BACKGROUND: The generation of velocity-time integrals (VTIs) from Doppler signals is an essential component of standard echocardiographic investigations. The most effective algorithm to compensate for growth in children has, however, not yet been identified. This study was initiated to establish pediatric reference values for VTI and to enhance the interpretability of those values, considering technical and physiological factors. METHODS: The echocardiographic data sets of healthy children and adolescents (N = 349; age range, 0-20 years) were recorded in a prospective approach and subsequently analyzed...
November 18, 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/29154046/simulation-of-guided-wave-ultrasound-propagation-in-composite-laminates-benchmark-comparisons-of-numerical-codes-and-experiment
#11
Cara A C Leckey, Kevin R Wheeler, Vasyl N Hafiychuk, Halyna Hafiychuk, Doğan A Timuçin
Ultrasonic wave methods constitute the leading physical mechanism for nondestructive evaluation (NDE) and structural health monitoring (SHM) of solid composite materials, such as carbon fiber reinforced polymer (CFRP) laminates. Computational models of ultrasonic wave excitation, propagation, and scattering in CFRP composites can be extremely valuable in designing practicable NDE and SHM hardware, software, and methodologies that accomplish the desired accuracy, reliability, efficiency, and coverage. The development and application of ultrasonic simulation approaches for composite materials is an active area of research in the field of NDE...
November 4, 2017: Ultrasonics
https://www.readbyqxmd.com/read/29142811/carotid-artery-stiffness-and-development-of-hypertension-in-people-with-paraplegia-and-no-overt-cardiovascular-disease-a-7-year-follow-up-study
#12
Olga Vriz, Nicole Bertin, Arianna Ius, Emiliana Bizzarini, Eduardo Bossone, Francesco Antonini-Canterin
Objectives: The aim of this study was to compare arterial stiffness between people with paraplegia and able-bodied persons (ABPs) and to assess cardiovascular markers that may be predictive of the development of arterial hypertension in people with spinal cord injury (SCI). Setting: This study was conducted at rehabilitation Hospital, Udine (Italy). Methods: Fifty-seven patients with SCI were prospectively enrolled and compared with 88 healthy ABPs...
October 2017: Journal of Cardiovascular Echography
https://www.readbyqxmd.com/read/29132381/patients-with-juvenile-idiopathic-arthritis-in-clinical-remission-with-positive-power-doppler-signal-in-joint-ultrasonography-have-an-increased-rate-of-clinical-flare-a-prospective-study
#13
Vanessa Bugni Miotto E Silva, Sônia de Aguiar Vilela Mitraud, Rita Nely Vilar Furtado, Jamil Natour, Claudio Arnaldo Len, Maria Teresa de Sande E Lemos Ramos Ascensão Terreri
BACKGROUND: Ultrasonography (US) studies carried out on joints of juvenile idiopathic arthritis (JIA) patients in clinical remission demonstrate the presence of subclinical synovitis. The significance of subclinical synovitis and the positive power Doppler (PD) signal on US in JIA in clinical remission is not well understood. The objectives of this study were to assess whether the changes detected by US in patients with JIA in clinical remission can predict disease flare and to evaluate factors associated with flare and joint damage over 30 months of follow-up...
November 13, 2017: Pediatric Rheumatology Online Journal
https://www.readbyqxmd.com/read/29130477/transcranial-doppler-and-lower-extremity-function-in-older-adults-einstein-aging-study
#14
Ali Ezzati, Tatjana Rundek, Joe Verghese, Carol A Derby
OBJECTIVES: To determine whether transcranial Doppler ultrasound (TCD) measures of mean blood flow velocity (MBFV) in the major cerebral arteries are associated with measures of lower extremity function in community-dwelling older adults. DESIGN: Cross-sectional study. SETTING: Community sample. PARTICIPANTS: Individuals aged 70 and older (mean 79.5, 54% female) without dementia participating in the Einstein Aging Study (N = 200)...
November 11, 2017: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/29111120/abnormal-coronary-flow-velocity-reserve-and-decreased-myocardial-contractile-reserve-are-main-factors-in-relation-to-physical-exercise-capacity-in-cardiac-amyloidosis
#15
Tor Skibsted Clemmensen, Hans Eiskjær, Henning Mølgaard, Anders Hostrup Larsen, Jens Soerensen, Niels Frost Andersen, Lars Poulsen Tolbod, Hendrik J Harms, Steen Hvitfeldt Poulsen
BACKGROUND: The aim of the present study was to evaluate the clinical importance of echocardiographic coronary flow velocity reserve (CFVR), resting and exercise left ventricular global longitudinal strain (LVGLS), and myocardial work efficiency (MWE) in patients with cardiac amyloidosis (CA). METHODS: The study population comprised 69 subjects: group A, 27 patients with CA confirmed by endomyocardial biopsy (CA positive); group B, 42 healthy control subjects. The amyloid phenotype in group A was as follows: patients with wild-type transthyretin-related amyloidosis (n = 10), carriers of the Danish familial transthyretin amyloidosis mutation with cardiac involvement (n = 5), and patients with amyloid light chain amyloidosis with cardiac involvement (n = 12)...
October 27, 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/29099133/sub-doppler-infrared-spectroscopy-of-resonance-stabilized-hydrocarbon-intermediates-%C3%AE-3-%C3%AE-4-ch-stretch-modes-and-ch2-internal-rotor-dynamics-of-benzyl-radical
#16
A Kortyna, A J Samin, T A Miller, D J Nesbitt
Highly reactive benzyl radicals are generated by electron dissociative attachment to benzyl chloride doped into a neon-hydrogen-helium discharge and immediately cooled to Trot = 15 K in a high density, supersonic slit expansion environment. The sub-Doppler spectra are fit to an asymmetric-top rotational Hamiltonian, thereby yielding spectroscopic constants for the ground (v = 0) and first excited (v = 1, ν3, ν4) vibrational levels of the ground electronic state. The rotational constants obtained for the ground state are in good agreement with previous laser induced fluorescence measurements (LIF), with vibrational band origins (ν3 = 3073...
November 3, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29091610/non-contact-control-of-two-photon-absorption
#17
Ayan Ray, Waseem Raja, Md Farooq Mir, Alok Chakrabarti
In this experimental work, we address the issue of the control of two-photon absorption in a Doppler broadened medium of Rb85 atoms under the ladder level coupling 5S1/2→5P3/2→5D3/2. Here, suppression and enhancement of two-photon absorption are executed by applying an auxiliary laser beam, which is not physically propagating in the same line of the pump-probe combination. Instead, the auxiliary beam, which is in resonance with the Rb85 D2 transition, is at a finite distance from the line of propagation of the pump-probe combination...
October 20, 2017: Applied Optics
https://www.readbyqxmd.com/read/29079632/an-abnormal-structure-of-the-left-ventricle
#18
Yu Kang, Zheng Li, Ben He
CLINICAL INTRODUCTION: A 36-year-old man was referred for evaluation of an abnormal left ventricular (LV) structure found incidentally on transthoracic echocardiography (TTE) (figure 1). He had no symptoms except for mild palpitations. There was no significant medical history. Physical examination was unremarkable. ECG showed regular sinus rhythm with ST changes in lead II, III, avF and V6 (see online supplementary file 1). Cardiac magnetic resonance (CMR) (figure 1C) was performed. Treadmill exercise test did not demonstrate any electrocardiographic ischaemic changes...
October 27, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/29067654/cardiac-involvement-in-duchenne-muscular-dystrophy-and-related-dystrophinopathies
#19
Sophie I Mavrogeni, George Markousis-Mavrogenis, Antigoni Papavasiliou, George Papadopoulos, Genovefa Kolovou
Dystrophinopathies include Duchenne muscular dystrophy (DMD), Becker muscular dystrophy (BMD), X-linked dilated cardiomyopathy (XLCM), and facioscapulohumeral muscular dystrophy (FSHD). DMD/BMD are X-linked recessive disorders, related to the synthesis of dystrophin. Most of DMD after the third decade of their age develop cardiomyopathy that remains silent, due to relative physical inactivity. Cardiac disease in female carriers presents with hypertrophy, arrhythmias or dilated cardiomyopathy, clinically overt by increasing age...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29059984/overnight-non-contact-continuous-vital-signs-monitoring-using-an-intelligent-automatic-beam-steering-doppler-sensor-at-2-4-ghz
#20
S Batchu, H Narasimhachar, J C Mayeda, T Hall, J Lopez, T Nguyen, R E Banister, D Y C Lie
Doppler-based non-contact vital signs (NCVS) sensors can monitor heart rates, respiration rates, and motions of patients without physically touching them. We have developed a novel single-board Doppler-based phased-array antenna NCVS biosensor system that can perform robust overnight continuous NCVS monitoring with intelligent automatic subject tracking and optimal beam steering algorithms. Our NCVS sensor achieved overnight continuous vital signs monitoring with an impressive heart-rate monitoring accuracy of over 94% (i...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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